private static bool Adjacent(int currentCellNum, int otherCellNum)
{
if (currentCellNum - 1 == otherCellNum)
{
return(true);
}
if (otherCellNum == 1 && currentCellNum <= 9)
{
return(true);
}
Rank currentRank = new Rank(RankNum(currentCellNum));
Rank otherRank = new Rank(RankNum(otherCellNum));
if (currentRank.rank != otherRank.rank &&
currentRank.rank - 1 != otherRank.rank)
{
throw new Exception("cell number must be in the current or prior rank to be adjacent");
}
Coordinate currCoord = currentRank.GetCoordinate(currentCellNum);
Coordinate otherCoord = otherRank.GetCoordinate(otherCellNum);
return(Coordinate.AreNeighbors(currCoord, otherCoord));
}